20021133020 has 24 divisors (see below), whose sum is σ = 48050719584. Its totient is φ = 6864388416.

The previous prime is 20021133007. The next prime is 20021133037. The reversal of 20021133020 is 2033112002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20021132986 and 20021133004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71503907 + ... + 71504186.

It is an arithmetic number, because the mean of its divisors is an integer number (2002113316).

Almost surely, 2^20021133020 is an apocalyptic number.

20021133020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021133020 is an abundant number, since it is smaller than the sum of its proper divisors (28029586564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021133020 is a wasteful number, since it uses less digits than its factorization.

20021133020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143008109 (or 143008107 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20021133020 its reverse (2033112002), we get a palindrome (22054245022).

The spelling of 20021133020 in words is "twenty billion, twenty-one million, one hundred thirty-three thousand, twenty".